What should the differential gear ratio be on a new car?

Once all this information is known use the following formula to get the accurate differential gear ratio for the larger tires: The rpm is 2806 at 105 km/h (65 mph), the current tires are 29 inch, the factory ratio is 3.73 and the new size upgraded tires are 33 inch.

What should the gear ratio be for a 33 inch tire?

The new tire size wanting to be fitted is 33 inch and the rpm needs to be a close to the 2806 as possible in order to keep it to stock specs. Just a quick scan at the differential gear ratio chart it’s obvious that a ratio of 3.909 is too low at 2587 rpm, ratio of 4.88 is too high at 3230 rpm.

What is the diff ratio on a rover?

There are other ratios like 3.8:1 and 4.1:1 and can be found on some rover cars. Diff conversions to change gearing are possible. This diff must not be confused with the so called “Wolf” diff which is also completely removable from the axle but it has a much shorter nose (pinion shaft) and is stronger than all the rover versions.

What was the gear ratio in the disco era?

The insides are different between 4 main era’s. Later Disco 1 onwards : 4 pinion gears, 24 spline, 3.54 ratio with multispline main pinion. (Rubber prop shaft coupling There are other ratios like 3.8:1 and 4.1:1 and can be found on some rover cars. Diff conversions to change gearing are possible.

Which is a better gear ratio 2.24 or 1.24?

regarding ratios, you are correct, the ratio is the amount of revs the driveshaft turns the ingoing axle to the diff, for the wheels to turn one revolution. a 2.24 will thus be a lot faster at the same enginespeed and same gear in the gearbox.

Where can I find the axle gear ratio?

GM RPO Axle Codes. To find the axle gear ratio of any GM vehicle, locate the RPO sticker (typically located in the glove box) and write down any codes starting with F, G, or H. Then, find those codes in the table below.

What kind of axle gear does a GM RPO have?

GM RPO Axle Code Notes RPO Axle Type G81 Positraction (Rear) G86 Limited Slip (Rear) G87 8.5″ Ring Gear G89 7.5″ Ring Gear

Why do Mercedes W115s have different gear ratios?

This is because the yoke/flange are of a different size. You could also swap out the cardanshaft/driveshaft to one with the right size yoke, if you for example are building a tuned w115 and need something beefier than the stock flexdisc